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Radionuclide Dosimetric Data Sheets
Chlorine-40
Summary data
General
Classification
Isotope: Cl-40
Atomic number (Z): 17
Mass number (A): 40
Neutron number (N): 23
Radioactive decay
Decay modes: β-
Half-life: 1.35 [m]
Decay constant: 8.5574e-03 [1/s]
Daughters: Ar-40 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.52645 [MeV]
Mean photon energy: 4.08208 [MeV]
Air kerma rate constant, Γ10: 1.171e-16 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.171e-16 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.446e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 0.000e+00
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
2.446e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 6.540e-13
[Gy·kg/Bq·s]
Dose point kernels (plot)
Dose point kernel source: Graves, et al. Medical Physics. 2019 Nov.; 46(11):5284-5293.
Note: Bins are spaced every 0.1 mm until a radius of 10 cm, and every 1 mm until a radius of 2 m.
Download tabulated dose point kernel file here: www.mirdsoft.org/products/MIRDspecs/Cl-40 DPK.csv
Summary spectra (plot)
Spectra source: ICRP Publication 107: Nuclear Decay Data for Dosimetric Calculations. Ann. ICRP 2008, 38 (3).
Download tabulated summary spectra file here: www.mirdsoft.org/products/MIRDspecs/Cl-40 Summary Spectrum.csv
Beta spectra (plot)
Spectra source: ICRP Publication 107: Nuclear Decay Data for Dosimetric Calculations. Ann. ICRP 2008, 38 (3).
Download tabulated beta spectra file here: www.mirdsoft.org/products/MIRDspecs/Cl-40 Beta Spectrum.csv
Tabulated data
Summary spectra (table)
Spectra source: ICRP Publication 107: Nuclear Decay Data for Dosimetric Calculations. Ann. ICRP 2008, 38 (3).
Note: Radiations with yield < 0.01 are excluded from the table, but are available in the linked *.csv data.
Download tabulated summary spectra file here: www.mirdsoft.org/products/MIRDspecs/Cl-40 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
6.43600e-01 |
6.723e-02 |
Gamma |
|
6.60100e-01 |
2.511e-02 |
Gamma |
|
8.81300e-01 |
2.592e-02 |
Gamma |
|
1.06310e+00 |
2.349e-02 |
Gamma |
|
1.39470e+00 |
1.215e-02 |
Gamma |
|
1.43210e+00 |
1.620e-02 |
Gamma |
|
1.46073e+00 |
8.100e-01 |
Gamma |
|
1.74650e+00 |
2.673e-02 |
Gamma |
|
1.79780e+00 |
2.187e-02 |
Gamma |
|
2.05050e+00 |
1.053e-02 |
Gamma |
|
2.22000e+00 |
6.966e-02 |
Gamma |
|
2.45770e+00 |
4.698e-02 |
Gamma |
|
2.52410e+00 |
2.025e-02 |
Gamma |
|
2.62170e+00 |
1.466e-01 |
Gamma |
|
2.84010e+00 |
2.754e-01 |
Gamma |
|
3.10170e+00 |
1.134e-01 |
Gamma |
|
3.91860e+00 |
3.888e-02 |
Gamma |
|
5.87960e+00 |
4.050e-02 |
Gamma |
|
6.41220e-01 |
5.054e-02 |
Beta |
|
9.25245e-01 |
2.041e-02 |
Beta |
|
1.26188e+00 |
2.197e-01 |
Beta |
|
1.38751e+00 |
2.624e-01 |
Beta |
|
1.49293e+00 |
1.341e-01 |
Beta |
|
1.57218e+00 |
5.346e-02 |
Beta |
|
1.68775e+00 |
4.471e-02 |
Beta |
|
1.91768e+00 |
2.041e-02 |
Beta |
|
2.25168e+00 |
1.652e-02 |
Beta |
|
2.77290e+00 |
3.888e-02 |
Beta |
|
3.49937e+00 |
5.832e-02 |
Beta |
Useful Links
Isotope decay characteristics are periodically updated as better measurements can be made - changes that may not be reflected on this page. Please see useful links:
National Nuclear Data Center (NNDC): https://www.nndc.bnl.gov/nudat3/mird/
International Atomic Energy Agency (IAEA) Livechart: https://www-nds.iaea.org/relnsd/vcharthtml/VChartHTML.html
Reference Links
ICRP Report 107: https://www.icrp.org/publication.asp?id=ICRP%20Publication%20107
Graves et al. Dose Point Kernels: https://doi.org/10.1002/mp.13789
MIRD Decay Schemes 2nd Edition: https://sites.snmmi.org/SNMMI-MAIN/iCore/Store/StoreLayouts/Item_Detail.aspx?iProductCode=0-932004-80-6
MIRDsoft MIRDspecs version 20250101 (www.mirdsoft.org)
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